Brake shoe



'May 17,1927, 1,628,951

0. B. CLARK BRAKE SHOE Filed July 28, 1926 x, I V

INVENTOR O'r To B.CLARK ATTORNEY Patented. May 17, 1927.

UNITED STATES.

PATENT OFFICE.

OTTO B. CLARK, OF EVANSVILLE, INDIANA, ASSIGNQB T BENDIX BRAKE COMPANY,

OF CHICAGO HJLINOIS, A CORPORATION OF ILLINOIS.

BRAKE SHOE.

Application filed July 28,

This -invention 'relates to brakes, and is illustrated as embodied in aninternal panding' automobile brake. An object of the invention is torovide for permanently looking a bushing or the shoe pivot) to the endof the brake shoe, b displacmgthe metal of the shoe over shou ders onthe bushing. Preferably the shoulders are formed by grooving thebushing, and the bushing is m sleeved in tubular fiangesof the shoewhich are spun into the grooves. In one form of shoe thebushing alsoserves as a reinforcing member connecting spaced anchoring arms in whichthe tubular flanges are formed.

The above and other objects and features of the invention, includingvarious novel and desirableparticular details of construction,

will be apparent from the following description of one illustrativeembodiment shown in the accompanying drawing, in

which;

Figure 1 is a vert cal section through the brake, just inside the headof the brake drum, and showing the shoes in side elevation;

Figure 2 is a partial section on the line 22 of Figure 1, showing" thebushings of two of the shoes;

' Figure 3 is a view corresponding to Figwe 2, but showing the partsbefore the bushlugs are fastened to the shoes;

Figure 4 is a section through the center shoe on the line 44 of Figurel; and

Figure 5 is a section through either of the other shoes on the lines 5-5of Figure 1.

The brake selected for illustration comprises a rotatable drum 10, atthe opcnside of which thefe may be a suitablesnpport such as a backingplate 12, and within which are arranged three shoes 14, 16, and 18. Shoe"l8 isanchoredon a pivot 20 carried by the backing plate, shoe-16 isanchored on a pivot 22, and shoe 14 is connected to shoe 16 by a pivot24.

The brake may be applied by means such as a double cam 26, shown with anend flange 28 laterally confining the free ends of the shoes, and whichforces shoes 14 and 18 apart against the resistance of a return spring30. Shoe 16 is applled by shoe 14, against the resistance of aniauxiharyreturn spring 32. The idle position of pivot 24,

mounted on pivot 20.

1926. Serial No. 125,464.

with the brake released, is determined by any suitable stop 34,

Each of the shoes 14 and 18 is, shown as bullt up of twostampingsrivetted or otherwise secured back to back, and including planeor radial flanges36 jointly forming the sti'fienin web of the shoe, andcylindrical oppositely-extending flanges 38 formmg the friction face andcarrying the brake lining 40. flanges 36 may be stifi'ened by shortlateral of shoe 18 may be projected within the curve of the shoe to forman anchoring arm Shoe 16 is shown as stampings 44, which may have shortinner strengthening lateral flanges, and which have cylindrical outerflanges 46 riveted or spot-welded or otherwise secured 'to a cy- Theinner edges of the web flanges 42. The flanges 36, at the lower end"built up of two spaced lindrical section of band 48 'formin the friction-face and carrying-the brake 50.. Stampings 44 project beyond the endsof the friction face to straddle the ends of lining shoes 14 and 18, andat the left end of shoe I 16 they are offset within the curve of th shoeto be mounted on pivot 22.

The present inventio relates to providing shoes of this genera type withbushings for pivots such as the pivots 20 and 22,

whether or not the shoes are oi the exact constructimi described above.and whether or not they are used in the particular brake illustrated. a

In the embodiment illustrated, shoe 18 is provided with alined openingsin-its flanges 36, preferably with the metal drawn in opposite(lll'UCtlOllS about the openings to form tubular flanges '52, and withthe openings sleeved ona cylindrical bushing 54. Bushmg 54 is grooved at56 to form shoulders facing in opposite directions, and over whichthemetal of flanges 52 is displaced by spinning or otherwise distortingthe flanges into the grooves.

Shoe 16 is provided with openings having 5 than by the terms of theappeuded'claims.

I claim: i i

I. A brake shoe having two portions formed with almed openings, themetal about the openings being drawn out to form tubulax flanges, incombination with a bushing in the openings havin grooves opposite saidtubularflangs, the tiiinges being spun into the grooves to lock thebushing-to th shoe.

2. A brnlco shoe having two portions formed with alincd openings, themetal about the. opcnings being drawn out in opposite directions to formtubular flanges p jccting away from the center of lhe'sliiic, incombination with a bushing in the open- 2 ings having groin-vs" oppositesaid tubular flanges, the flanges being spun into the ,groovos to lockthe bushing to the shoe.

' 3. A brake shoe having two portions formed with aimed openings, themetal about the openings being drawn out to form tubularflanges incombination with a bushmg in the openings havln grooves opposite saidtub'uiar flanges; the anges being spun into the grooves to lock thebushing to the shoe, the said two portions of the shoe being spaced aconsidemble distance apart and connected b .the bushing.

4. A bro e shoe having two portions formed with alined o enings, abushing in said openings havingfs oulders'adjaceut said portions, withthe metal of said portions of the shoe about the openings displaced overthe shoulders of the bushin to lock the bushing pernmnently to the s we.4

A brake shoe' having two portions formed with alined openings, :1.bushing in saidopenings having shoulders adjacent said portions andfacing away from the center of the shoe, with the metal of saidportions,

of the shoe about the openings displaced mm the shoulders of thebushingto lock the bushing permanently to the shoe.

In testimony whereof, I have hereunto signed my name.

OTTO B. CLARK.

